Rolling clamp control mechanism assembly and gravity type infusion device

Abstract

A roll clamp control mechanism assembly is provided that includes a roll clamp control mechanism adapted to a roll clamp to control a position of the roll clamp and adjust a fluid flow rate in a connector tube of an infusion device. The mechanism may include a roll clip, a roller, a control unit, a swivel bearing, a body fixture, and a linear drive for controlling the position of the roller on the connector tube. Different assemblies for the roll clamp control mechanism are shown and described, all of which allow the use of the control unit to vary the clamping pressure on the connector tube. A gravity infusion device for adjusting the flow rate of a fluid is also provided.

Description

Technical Field

[0001] The utility model generally relates to a gravity-type intravenous injection (IV) kit or an infusion pump flow control device, in particular to a precision roller clamp control mechanism. Background Art

[0002] Flow controllers in the form of roller clamps are used in intravenous (IV) applications in the medical field. A typical roller clamp controls the flow rate through an IV tube by clamping the IV tube between a roller and a housing. First, this approach provides a limited range of flow rate control because the roller is inherently too sensitive and a small movement or size change of the roller will result in a large change in the flow rate of the fluid through the tube. Therefore, the relatively rough flow rate changes provided by a typical roller clamp make it difficult to provide precise flow control.

[0003] In addition, typical roller clamps have flow rate drift issues based on the slippage of the rollers, such as when fluid pressure in the tube causes the rollers to roll back from the adjusted position. In addition, typical roller clamps are sized for specific IV set tube sizes, which requires having roller clamps of different sizes for use with various IV set tube sizes.

[0004] It is therefore desirable to provide a precision roller assembly that is used with multiple sizes of IV tubes, provides quick coarse flow rate adjustments and fine flow rate adjustments, and eliminates or minimizes roller slip, and that can also be machine controlled by a control unit in a gravity IV set. Utility Model Content

[0005] One or more embodiments provide a roller clamp control mechanism assembly. The roller clamp assembly includes a housing configured to receive a portion of a connector tube of an infusion device. The housing may include two opposing side walls spaced apart from each other, each side wall having opposing guide grooves longitudinally positioned in an inner surface; a guide wall disposed between the side walls, the guide walls converging along their lengths toward the position of the guide grooves; a roller having two axial protrusions slidably disposed in the guide grooves, the roller being configured to move along the longitudinal axis of the housing when the protrusions slide in the guide grooves, wherein the spacing between the guide walls and the roller decreases over the length of the guide walls; and a roller clamp control mechanism adapted to the roller clamp to control the position of the roller clamp.

[0006] In some embodiments, the roller clamp control mechanism includes: a control unit; two rotation bearings fixed to the housing of the control unit; and a body fixture attached to the roller clamp and positioned in the control unit, the control unit being connected to a linear drive. Wherein the roller clamp is placed in the housing of the control unit so that the roller is between the two rotation bearings, and wherein when the linear drive is actuated, the body fixture is driven forward or backward while the roller remains stationary relative to the control unit, thereby varying the clamping pressure on the connector tube.

[0007] In some embodiments, the body fixture is attached to the roller clamp via mechanical interlocking or surface friction. In some embodiments, the sliding of the roller in the direction of the smaller spacing between the guide wall and the roller causes the roller to gradually increase the degree of impact on the connector tube, wherein the increased impact of the roller on the connector tube is configured to reduce the fluid flow rate through the connector tube. In some embodiments, the rotary bearing has a gear pattern on the surface that interlocks with the gear pattern on the surface of the roller. In some embodiments, the roller is configured as a substantially binary flow switch, for example, wherein the flow rate is either fully open, adjusted downward to a specific flow rate, or a completely blocked flow rate. In some embodiments, a spring pin connects the control unit to the linear drive.

[0008] In some embodiments, the roller clamp control mechanism includes a control unit and two rotating bearings, which are fixed in a bearing housing. Wherein, the bearing housing is connected to a linear drive device, and wherein when the linear drive device is actuated, the bearing housing moves forward and backward as needed, which adjusts the position of the roller on the connector tube. In some embodiments, the rotating bearing is attached to the roller clamp via mechanical interlocking or surface friction. In some embodiments, the sliding of the roller in the direction of the smaller spacing between the guide wall and the roller causes the roller to gradually increase the impact degree of the connector tube, wherein the increased impact of the roller on the connector tube is configured to reduce the fluid flow rate through the connector tube. In some embodiments, the roller clamp assembly also includes a spring pin that attaches the roller clamp to the control unit.

[0009] In some embodiments, the roller clamp control mechanism includes: two rotating bearings, each of which is fixed in a corresponding bearing arm, and the bearing arm pivots around the fixed axis of the bearing arm; and a bearing clearance path, which is used for sliding the rotating bearing. Wherein, the bearing clearance path allows the bearing arm of each rotating bearing to rotate inwardly without rotating outwardly, and wherein the roller clamp assembly is able to slide on the roller and adjust the roller position. In some embodiments, the sliding of the roller in the direction of the smaller spacing between the guide wall and the roller causes the roller to gradually increase the impact degree of the connector tube, wherein the increased impact of the roller on the connector tube is configured to reduce the flow rate of the fluid through the connector tube. In some embodiments, the roller of the roller clamp assembly is connected in a manner independent of the initial position of the roller. In some embodiments, the roller clamp assembly also includes a bearing arm return spring, which is configured to bias the bearing arm to return to an upright position.

[0010] An embodiment of the utility model provides a gravity-type infusion device, which includes a puncture needle, a drip chamber, a connector tube, accessories and a roller clamp assembly, wherein the roller clamp assembly includes a shell, which is configured to receive a portion of the connector tube of the infusion device, the shell including: two opposite side walls, which are spaced apart from each other, each side wall having opposite guide grooves longitudinally positioned in the inner surface; a guide wall, which is arranged between the side walls, the guide walls converge toward the position of the guide grooves along their lengths, a roller having two axial protrusions slidably disposed in the guide grooves, the roller being configured to move along the longitudinal axis of the shell when the protrusions slide in the guide grooves, wherein the spacing between the guide walls and the roller decreases over the length of the guide walls, and a roller clamp control mechanism, which is adapted to the roller clamp to control the position of the roller clamp.

[0011] In some embodiments, the roller clamp control mechanism includes: a control unit; two rotating bearings fixed to the housing of the control unit; and a body fixture attached to the roller clamp and positioned in the control unit, the control unit being connected to a linear drive device, wherein the roller clamp is placed in the housing of the control unit so that the roller is between the two rotating bearings, and wherein when the linear drive device is actuated, the body fixture is driven forward or backward while the roller remains stationary relative to the control unit, thereby changing the clamping pressure on the connector tube.

[0012] In some embodiments, the roller clamp control mechanism includes a control unit and two rotary bearings fixed in a bearing housing, wherein the bearing housing is connected to a linear drive, and wherein when the linear drive is actuated, the bearing housing moves forward and backward as needed, which adjusts the position of the roller on the connector tube. In some embodiments, the roller clamp control mechanism includes: two rotary bearings, each of which is fixed in a corresponding bearing arm, the bearing arm pivoting around a fixed axis of the bearing arm; and a bearing clearance path for sliding the rotary bearings, wherein the bearing clearance path allows the bearing arm of each rotary bearing to rotate inwardly without rotating outwardly, and wherein the roller clamp assembly is able to slide on the roller and adjust the roller position

[0013] The foregoing and other features, aspects, and advantages of the disclosed embodiments will become more apparent from the following detailed description and accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.

[0015] Figure 1A A perspective view of an example infusion set with a typical roller clamp is depicted.

[0016] Figure 1B Depicted is a perspective view of an example infusion device having a roller clamp control mechanism according to aspects of the present disclosure.

[0017] Figure 2 Depicted is a perspective view of an example roller clamp according to aspects of the present disclosure.

[0018] Figure 3 Depicted is a side view of the precision roller clamp control mechanism.

[0019] Figure 4 Depicted is a side view of the precision roller clamp control mechanism.

[0020] Figure 5 Depicted is a side view of the precision roller clamp control mechanism.

[0021] Figure 6 Depicted Figure 5 A perspective view of the precision roller clamp control mechanism.

[0022] Figure 7 depicts Figure 5 Front view of the precision roller clamp control mechanism.

[0023] Figure 8 depicts Figure 5 A perspective view of the precision roller clamp control mechanism.

[0024] Fig. 9 Depicted Figure 5 Side view of the precision roller clamp control mechanism.

[0025] Fig.10 Depicted Figure 5 Side view of the precision roller clamp control mechanism.

[0026] Fig.11 Depicted Figure 5 Side view of the precision roller clamp control mechanism.

[0027] Fig.12 Depicted Figure 5 Side view of the precision roller clamp control mechanism.

[0028] Fig.13 Depicted Figure 5 Side view of the precision roller clamp control mechanism.

[0029] Fig.14 Depicted Figure 5 Side view of the precision roller clamp control mechanism. DETAILED DESCRIPTION

[0030] The specific embodiments set forth below describe various configurations of the subject technology, and are not intended to represent the only configuration that can practice the subject technology. The specific embodiments include specific details for providing a thorough understanding of the subject technology. Therefore, the dimensions provided in some aspects are used as non-limiting examples. However, it is apparent to those skilled in the art that the subject technology can be practiced without these specific details. In some instances, in order to avoid obscuring the concept of the subject technology, known structures and components are shown in block diagram form.

[0031] It should be understood that the present disclosure includes examples of subject technology and does not limit the scope of the appended claims. Various aspects of the subject technology will now be disclosed according to specific but non-limiting examples. The various embodiments described in this disclosure can be performed in different ways and variations and according to the desired application or implementation.

[0032] The present disclosure relates to a roller clamp, and in particular to a roller clamp control mechanism that can be controlled by a machine for use with a roller clamp in a gravity-fed IV set. The roller clamp regulates the flow rate of a medical fluid (e.g., a drug solution or blood to be administered to a patient) through a tube. A standard infusion set can be used to infuse the fluid. Figure 1A An example of a standard infusion set is shown in .

[0033] The infusion device may include a puncture spike 20, which may be a sharp spike for puncturing a rubber stopper or round and blunt for insertion into a bag. The spike may include one channel for fluid and optionally a second channel for ventilation. A vent 21 may be present near the puncture spike to allow air to flow into the drip chamber 22. The vent 21 may be provided with a bacterial filter to prevent bacteria from entering the device.

[0034] The droplet chamber 22 has a droplet generator 23 at the top of the droplet chamber 22, which generates droplets of a certain size. Droplets from the droplet generator 23 fall into the droplet chamber 22, so that the droplet chamber 22 is partially filled with liquid. This prevents air bubbles from entering the connector tube 24, which can be harmful to the patient. A particle filter can be set at the lower hole of the droplet chamber 22.

[0035] In some embodiments, a connector tube 24 connects the drip chamber 22 to the patient. The connector tube 24 may be about 150 cm long and may be made of PVC. For clarity, the tube 24 is shown in FIG. Figure 1A The connector tube 24 typically has a continuous diameter throughout the length of the tube.

[0036] The connector tube 24 ends at a Luer fitting 25 that is standardized for connection to all other components of the device having a standard Luer taper. It will be appreciated by those skilled in the art that the Luer fitting 25 can be fitted to a hypodermic needle (not shown) for infusing medical fluids into a patient's circulatory system (e.g., into a vein). A roller clamp 26 is between the drip chamber 22 and the Luer fitting 25 and engages the connector tube 24.

[0037] The roller clamping mechanism according to the embodiment of the present disclosure can be used with Figure 1B In some embodiments, the standard infusion device includes a control unit 27 and a drip chamber 22, a roller clamp assembly 26, and a connector tube 24 as described above. The control unit 27 can control the roller clamp according to various aspects of the present disclosure.

[0038] A non-limiting example of a roller clamp assembly 26 is Figure 2 , and can be used with the roller clamp control mechanism described herein. The roller clamp assembly 26 can have two opposing side walls 44 and 45 with a pair of guide grooves 41 aligned with each other and facing each other. A flow regulating roller 28 can be provided, which has an axially extending shaft 42 protruding from the center of each side of the roller 28. The shaft 42 of the roller 28 can be captured by the guide groove 41 and seated in the guide groove 41 so that the roller 28 can move up and down in the guide groove 41.

[0039] In some embodiments, the entire roller clamp assembly 26 has four walls in an open-ended box-like configuration (see Figure 2 ), and the size and configuration of the roller clamp assembly 26 are designed to receive the connector tube. In use, the tube 24 passes through the roller clamp assembly 26 between two opposite side walls 44 and 45, the roller 28 and the guide wall 31 opposite to the roller 28.

[0040] In some embodiments, in the roller clamp assembly 26, the surface of the guide wall 31 may converge along its length in the direction of the guide groove 41 toward the location of the guide groove 41. This tends to push the connector tube 24 within the roller clamp assembly 26 toward the guide groove 41 and thus toward the roller 28.

[0041] Therefore, rolling the roller 28 downward along the guide groove 41 in the direction of the arrow in the direction of the gradually approaching guide wall 31 causes the roller 28 to hit the connector tube 24. When the roller 28 hits on the tube 24, the tube 24 becomes squeezed because the tube 24 is a flexible material such as PVC, and the inner lumen of the infusion tube 24 becomes smaller as a result. In this way, by narrowing the inner lumen, the flow rate of the liquid passing through the connector tube 24 can be adjusted.

[0042] Thus, the roller clamp assembly 26 controls the flow rate through the infusion tube 24 by clamping the infusion tube 24 between the roller 28 and the guide wall 31. As discussed above, this provides flow rate variation because small movements of the roller 28 result in large changes in the flow rate of the fluid through the tube 24. For example, with the roller 28 in a fully open position where the roller 28 does not strike the tube 24, the fluid flow rate may be anywhere from 2,000 to 8,000 milliliters per hour (ml / hr). This flow rate may be too fast to count drips in a drip chamber (e.g., drip chamber 22) because the maximum flow rate for counting drips may be 250 ml / hr.

[0043] In addition, the force of the fluid in the tube 24 applies a biasing force against the roller 28, which generally causes the roller 28 to slip from the adjusted position (e.g., the roller 28 rolls back). In addition, the size of the roller 28 needs to be designed for the size of the tube 24, so if a tube of a different size (e.g., diameter) is used, then a different size roller must also be used.

[0044] refer to Figures 3 to 14 , shows an example of a roller clamp assembly control mechanism that allows precise control of the roller clamp assembly 26 by the control unit 27.

[0045] Figure 3The roller clamp control mechanism assembly 300 shown may have a main body fixture 302 including two opposing side walls and the roller clamp assembly 26 may be disposed inside the main body fixture. In some embodiments, the roller clamp assembly 26 includes a roller 301. In some embodiments, two rotation bearings 304 and 305 may be fixed to the control unit (for simplicity, Figure 3 The housing of the control unit 27 is not shown in the figure. In some embodiments, the rotating bearings 304 and 305 have a smooth surface. In some embodiments, the rotating bearings 304 and 305 may have a gear pattern on the surface that interlocks with the gear pattern on the roller 301. In some embodiments, the body fixture 302 is attached to the roller clamp and positioned in the control unit 27, which is connected to the linear drive 306 by a spring pin 307. The roller clamp assembly 26 can be placed in the housing of the control unit 27 so that the roller 301 is between the two rotating bearings 304 and 305. In some embodiments, when the linear drive 306 is actuated, the body fixture 302 is driven forward or backward while the roller 301 remains stationary relative to the control unit 27, thereby changing the clamping pressure on the connector tube 303. This change in clamping pressure closes or opens flow accordingly. Therefore, the roller clamp control mechanism assembly 300 controlled by the control unit 27 effectively limits the flow through the connector conduit 303 to a desired rate.

[0046] In some embodiments, the body fixture 302 is attached to the roller clamp assembly 26 via mechanical interlock or surface friction (eg, a rubber pad with sufficient spring preload firmly grips the roller body housing and does not slip).

[0047] When the roller 301 is moved into the fully engaged position, the fluid flow rate can be quickly adjusted to a fully blocked flow rate of 0 ml / hr (e.g., fast blocking), or any other desired fluid flow rate between 0 ml / hr and 250 ml / hr (e.g., 50 ml / hr, 125 ml / hr) by the control unit 27. Thus, the roller 301 can be configured as a substantially binary flow switch (e.g., an on / off switch), for example, where the flow rate is either fully open, or adjusted down to a specific flow rate (such as 250 ml / hr), or even to a fully blocked flow rate of 0 ml / hr.

[0048] Figure 4The roller clamp control mechanism assembly 400 shown can have a main body fixture 402 including two opposing side walls and a roller clamp assembly 26 disposed inside the main body fixture 402. In some embodiments, the roller clamp assembly 26 includes a roller 401. In some embodiments, two rotating bearings 404 and 405 are fixed in a bearing housing 406, which is connected to a linear drive. In some embodiments, the rotating bearings 404 and 405 have a smooth surface. In some embodiments, the rotating bearings 404 and 405 can have a gear pattern on the surface that interlocks with the gear pattern on the surface of the roller 401. In some embodiments, the roller clamp 402 is held fixed to the control unit 27 (for simplicity, Figure 4 402). When the linear drive is actuated, the bearing housing 406 moves forward and backward as needed, which adjusts the position of the roller 401 on the connector tube 403. This change in clamping pressure closes or opens flow accordingly. Thus, the roller clamp control mechanism assembly 400 controlled by the control unit 27 effectively limits the flow through the connector conduit 403 to a desired rate. In some embodiments, a spring pin 407 attaches the roller clamp 402 to the control unit 27.

[0049] When the roller 301 is moved into the fully engaged position, the fluid flow rate can be quickly adjusted to a fully blocked flow rate of 0 ml / hr (e.g., fast blocking), or any other desired fluid flow rate between 0 ml / hr and 250 ml / hr (e.g., 50 ml / hr, 125 ml / hr) by the control unit 27. Thus, the roller 401 can be configured as a substantially binary flow switch (e.g., an on / off switch), for example, where the flow rate is either fully open, or adjusted down to a specific flow rate (such as 250 ml / hr), or even to a fully blocked flow rate of 0 ml / hr.

[0050] Figures 5 to 14The roller clamp control mechanism assembly 500 shown can have a main body fixture 502 including two opposing side walls and the roller clamp 26 assembly can be placed inside the main body fixture 502. In some embodiments, the roller clamp assembly 26 includes a roller 501. In some embodiments, two rotating bearings 504 and 505 are fixed in their own corresponding bearing arms 507, which can pivot around the bearing arm fixing axis 508. In some embodiments, the rotating bearings 504 and 505 have a smooth surface. In some embodiments, the rotating bearings 504 and 505 can have a gear pattern on the surface that interlocks with the gear pattern on the surface of the roller 501. In some embodiments, when the bearing arm 507 rotates, the bearings 504 and 505 are able to slide through the bearing clearance path 509. In some embodiments, the bearing clearance path 509 allows the bearing arm 507 to rotate in one direction (e.g., inward) but not in the opposite direction (e.g., outward). In some embodiments, the entire bearing assembly is thus able to slide on the roller 501 and snap into place with the roller 501, such as Figures 9 to 14 As shown in . As the bearing assembly slides, the bearing housing 506 moves forward and backward as needed, which adjusts the position of the roller 501 on the connector tube. This change in clamping pressure closes or opens flow accordingly. Therefore, the roller clamp control mechanism assembly 500 controlled by the control unit 27 effectively limits the flow through the connector conduit to a desired rate. In some embodiments, the bearing arm is attached by a bearing arm return spring 510. The bearing arm return spring 510 biases the bearing arm 507 to return to the upright position.

[0051] When the roller 501 is moved into the fully engaged position, the fluid flow rate can be quickly adjusted to a fully blocked flow rate of 0 ml / hr (e.g., fast blocking), or any other desired fluid flow rate between 0 ml / hr and 250 ml / hr (e.g., 50 ml / hr, 125 ml / hr) by the control unit 27. Thus, the roller 501 can be configured as a substantially binary flow switch (e.g., an on / off switch), for example, where the flow rate is either fully open, or adjusted down to a specific flow rate (such as 250 ml / hr), or even to a fully blocked flow rate of 0 ml / hr.

[0052] In some embodiments, the roller clamp control mechanism may include: a control unit; two rotation bearings fixed to the housing of the control unit; and a body fixture attached to the roller clamp and positioned in the control unit, which is connected to the linear drive. The roller clamp can be placed in the housing of the control unit so that the roller is between the two rotation bearings. In some embodiments, when the linear drive is actuated, the body fixture is driven forward or backward while the roller remains stationary relative to the control unit. As a result, the clamping pressure on the connector tube changes.

[0053] In some embodiments, the roller clamp control mechanism includes a control unit and two rotating bearings fixed in a bearing housing. In some embodiments, the bearing housing is connected to a linear drive device, and when the linear drive device is actuated, the bearing housing moves forward and backward as required, which adjusts the position of the roller on the connector tube.

[0054] In some embodiments, the roller clamp control mechanism includes: two rotating bearings, each of which is fixed in a corresponding bearing arm, the bearing arm pivoting around a fixed axis of the bearing arm; and a bearing clearance path for sliding the rotating bearings. In some embodiments, the bearing clearance path allows the bearing arm of each rotating bearing to rotate inwardly without rotating outwardly. Then, the roller clamp assembly can slide on the roller and adjust the roller position.

[0055] For convenience, various examples of various aspects of the present disclosure are described as numbered clauses (1, 2, 3, etc.). These are provided as examples and do not limit the subject technology. The drawings and reference numerals provided below are used as examples for illustrative purposes only, and the clauses are not limited by these reference numerals.

[0056] Item 1: A roller clamp control mechanism assembly, comprising: a shell configured to receive a portion of a connector tube of an infusion device, the shell comprising: two opposing side walls spaced apart from each other, each side wall having opposing guide grooves longitudinally positioned in an inner surface; a guide wall disposed between the side walls, the guide walls converging along their lengths toward the position of the guide grooves; a roller having two axial protrusions slidably disposed in the guide grooves, the roller being configured to move along the longitudinal axis of the shell when the protrusions slide in the guide grooves, wherein the spacing between the guide walls and the roller decreases over the length of the guide walls; and a roller clamp control mechanism adapted to the roller clamp to control the position of the roller clamp.

[0057] Item 2: A roller clamp assembly according to Item 1, wherein the roller clamp control mechanism includes: a control unit; two rotating bearings fixed to the housing of the control unit; and a body fixture attached to the roller clamp and positioned in the control unit, the control unit being connected to a linear drive device, wherein the roller clamp is placed in the housing of the control unit so that the roller is between the two rotating bearings, and wherein when the linear drive device is actuated, the body fixture is driven forward or backward while the roller remains stationary relative to the control unit, thereby changing the clamping pressure on the connector tube.

[0058] Clause 3: The roller clamp assembly of clause 2, wherein the body fixture is attached to the roller clamp via mechanical interlock or surface friction.

[0059] Clause 4: A roller clamp assembly according to the preceding clause, wherein sliding of the roller in the direction of the smaller spacing between the guide wall and the roller causes a gradually increasing degree of impact of the roller on the connector tube, wherein the increased impact of the roller on the connector tube is configured to reduce the flow rate of the fluid through the connector tube.

[0060] Clause 5: The roller clamp assembly according to the preceding clause, wherein the rotary bearing has a gear pattern on the surface that interlocks with the gear pattern on the surface of the roller.

[0061] Clause 6: The roller clamp assembly of the preceding clause, wherein the roller is configured as a substantially binary flow switch, for example, wherein the flow rate is either fully open, adjusted down to a specific flow rate, or a completely blocked flow rate.

[0062] Clause 7: The roller clamp assembly according to the preceding clause, further comprising a spring pin connecting the control unit to the linear drive.

[0063] Item 8: A roller clamp assembly according to Item 1, wherein the roller clamp control mechanism includes a control unit and two rotating bearings fixed in a bearing housing, wherein the bearing housing is connected to a linear drive device, and wherein when the linear drive device is actuated, the bearing housing moves forward and backward as needed, which adjusts the position of the roller on the connector tube.

[0064] Clause 9: The roller clamp assembly of clause 8, wherein the rotary bearing is attached to the roller clamp via mechanical interlock or surface friction.

[0065] Item 10: The roller clamp assembly of Item 8, wherein sliding of the roller in the direction of the smaller spacing between the guide wall and the roller causes a gradually increasing degree of impact of the roller on the connector tube, wherein the increased impact of the roller on the connector tube is configured to reduce the flow rate of the fluid through the connector tube.

[0066] Clause 11: The roller clamp assembly of clause 8, further comprising a spring pin that attaches the roller clamp to the control unit.

[0067] Item 12: A roller clamp assembly according to Item 1, wherein the roller clamp control mechanism includes: two rotary bearings, each of which is fixed in a corresponding bearing arm, which pivots around a fixed axis of the bearing arm; and a bearing clearance path, which is used for the rotary bearings to slide, wherein the bearing clearance path allows the bearing arm of each rotary bearing to rotate inwardly instead of outwardly, and wherein the roller clamp assembly is able to slide on the roller and adjust the roller position.

[0068] Item 13: A roller clamp assembly according to Item 12, wherein sliding of the roller in the direction of the smaller spacing between the guide wall and the roller causes the roller to gradually increase the impact of the roller on the connector tube, wherein the increased impact of the roller on the connector tube is configured to reduce the flow rate of the fluid through the connector tube.

[0069] Clause 14: The roller clamp assembly of clause 12, wherein the rollers of the roller clamp assembly are connected in a manner that is independent of the initial position of the rollers.

[0070] Clause 15: The roller clamp assembly of clause 12, further comprising a bearing arm return spring configured to bias the bearing arm to return to the upright position.

[0071] Item 16: A gravity-fed infusion device comprising a puncture needle, a drip chamber, a connector tube, accessories and a roller clamp assembly, the roller clamp assembly comprising: a shell configured to receive a portion of the connector tube of the infusion device, the shell comprising: two opposing side walls spaced apart from each other, each side wall having opposing guide grooves longitudinally positioned in an inner surface; a guide wall disposed between the side walls, the guide walls converging along their lengths toward the position of the guide grooves; a roller having two axial protrusions slidably disposed in the guide grooves, the roller being configured to move along the longitudinal axis of the shell when the protrusions slide in the guide grooves, wherein the spacing between the guide walls and the roller decreases over the length of the guide walls; and a roller clamp control mechanism adapted to the roller clamp to control the position of the roller clamp.

[0072] The present disclosure is provided to enable any person skilled in the art to practice the various aspects described herein. The present disclosure provides various examples of the subject technology, and the subject technology is not limited to these examples. Various modifications to these aspects will be apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects.

[0073] Unless otherwise specified, elements referred to in the singular are not intended to mean "one and only one," but rather "one or more." Unless otherwise specifically specified, the term "some" refers to one or more. Masculine pronouns (e.g., his) include the feminine and neuter gender (e.g., her and its) and vice versa. Headings and subheadings, if any, are used for convenience only and do not limit the invention.

[0074] The word "exemplary" as used herein means "serving as an example or illustration." Any aspect or design described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other aspects or designs. In one aspect, the various alternative configurations and operations described herein may be considered to be at least equivalent.

[0075] As used herein, the phrase "at least one of" preceding a series of items, with the term "or" separating any of the items, modifies the list as a whole, rather than each item in the list. The phrase "at least one of" does not require selection of at least one item; rather, the phrase allows for a meaning that includes at least one of any one item, and / or at least one of any combination of items, and / or at least one of each of the items. For example, the phrase "at least one of A, B, or C" may mean: only A, only B, or only C; or any combination of A, B, and C.

[0076] Phrases such as "aspects" do not mean that such aspects are essential to the subject technology or that such aspects apply to all configurations of the subject technology. Disclosures involving one aspect may apply to all configurations, or one or more configurations. An aspect may provide one or more examples. Phrases such as "aspects" may refer to one or more aspects and vice versa. Phrases such as "embodiments" do not mean that such embodiments are essential to the subject technology or that such embodiments apply to all configurations of the subject technology. Disclosures involving one embodiment may apply to all embodiments, or one or more embodiments. An embodiment may provide one or more examples. Phrases such as "embodiments" may refer to one or more embodiments and vice versa. Phrases such as "configurations" do not mean that such configurations are essential to the subject technology or that such configurations apply to all configurations of the subject technology. Disclosures involving one configuration may apply to all configurations or one or more configurations. One configuration may provide one or more examples. Phrases such as "configurations" may refer to one or more configurations and vice versa.

[0077] In one aspect, unless otherwise indicated, all measurements, values, levels, positions, quantities, sizes and other specifications set forth in this specification (including the appended claims) are approximate and not exact. In one aspect, they are intended to have a reasonable range consistent with the functions to which they are related and the customary practices in the art to which they belong.

[0078] It should be understood that the specific order or hierarchy of steps, operations or processes disclosed is an illustration of an exemplary approach. Based on design preferences, it should be understood that the specific order or hierarchy of steps, operations or processes can be rearranged. Some of the steps, operations or processes can be performed simultaneously. Some or all of the steps, operations or processes can be performed automatically without user intervention.

[0079] All structural and functional equivalents of the elements throughout the various aspects described in this disclosure that are known or will be known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be covered by the claims. In addition, nothing disclosed herein is intended to be dedicated to the public, regardless of whether such disclosure is explicitly stated in the claims. Unless a claim element is explicitly stated using the phrase "device for...", the claim element shall not be interpreted under the provisions of 35 U.S.C. §112 (f). In addition, with respect to the use of the terms "including", "having", etc., such terms are intended to be included in a manner similar to the term "comprising" because "including" is interpreted when used as a transitional word in a claim.

[0080] The utility model name, background technology, utility model content, figure description and abstract of the present disclosure are hereby incorporated into the present disclosure and are provided as illustrative examples of the present disclosure rather than as restrictive descriptions. It should be understood at the time of submission that they will not be used to limit the scope or meaning of the claims. In addition, in the specific implementation, it can be seen that the description provides illustrative examples, and for the purpose of simplifying the present disclosure, various features are grouped together in various embodiments. This disclosure method should not be interpreted as reflecting the intention that the claimed subject matter requires more features than the features explicitly stated in each claim. Instead, as reflected in the following claims, the utility model subject matter lies in less than all the features of a single disclosed configuration or operation. The following claims are hereby incorporated into the specific implementation, wherein each claim itself is independently a subject matter claimed separately.

[0081] The claims are not intended to be limited to the aspects described herein, but are to be accorded the full scope consistent with the language of the claims and to encompass all legal equivalents. Nevertheless, no claim is intended to include subject matter that does not satisfy the requirements of 35 U.S.C. §101, 102, or 103, nor should it be interpreted in such a manner.

Claims

1. A roller clamp control mechanism assembly, characterized in that: It includes: A housing configured to receive a portion of a connector tube of an infusion device, the housing comprising: two opposing side walls spaced apart from one another, each side wall having opposing guide grooves longitudinally positioned in an inner surface; a guide wall disposed between the side walls, the guide wall converging along its length toward the location of the guide groove; a roller having two axial protrusions slidably disposed in the guide grooves, the roller being configured to move along the longitudinal axis of the housing as the protrusions slide in the guide grooves, wherein the spacing between the guide wall and the roller decreases over the length of the guide wall; and A roller clamp control mechanism is adapted to the roller clamp to control the position of the roller clamp.

2. The roller clamp control mechanism assembly according to claim 1, characterized in that: The roller clamp control mechanism comprises: Control unit; two rotary bearings fixed to the housing of the control unit; and a body fixture attached to the roller clamp and positioned in the control unit, the control unit being connected to the linear drive, wherein the roller clamp is placed in the housing of the control unit so that the roller is between the two rotary bearings, and Wherein when the linear drive device is actuated, the body fixing device is driven forward or backward, while the roller remains stationary relative to the control unit, thereby changing the clamping pressure on the connector tube.

3. The roller clamp control mechanism assembly according to claim 2, characterized in that: The body fixture is attached to the roller clamp via mechanical interlock or surface friction.

4. The roller clamp control mechanism assembly according to claim 2, characterized in that: Sliding of the roller in the direction of the smaller spacing between the guide wall and the roller causes a gradually increasing degree of impact of the roller on the connector tube, wherein the increased impact of the roller on the connector tube is configured to reduce a fluid flow rate through the connector tube.

5. The roller clamp control mechanism assembly according to any one of claims 2 to 4, characterized in that: The rotary bearing has a gear pattern on a surface that interlocks with a gear pattern on a surface of the roller.

6. The roller clamp control mechanism assembly according to claim 4, characterized in that: The roller is configured as a binary flow switch, where the flow rate is either fully open, adjusted down to a specific flow rate, or completely blocked.

7. The roller clamp control mechanism assembly according to any one of claims 2 to 4, characterized in that: It also comprises a spring pin which connects the control unit to the linear drive.

8. The roller clamp control mechanism assembly according to claim 1, characterized in that: The roller clamp control mechanism comprises: a control unit; and Two swivel bearings, which are fixed in the bearing housing, wherein the bearing housing is connected to a linear drive, and Wherein when the linear drive is actuated, the bearing housing moves forward and backward as required, which adjusts the position of the roller on the connector tube.

9. The roller clamp control mechanism assembly according to claim 8, characterized in that: The swivel bearing is attached to the roller clamp via mechanical interlocking or surface friction.

10. The roller clamp control mechanism assembly according to claim 8, characterized in that: Sliding of the roller in the direction of the smaller spacing between the guide wall and the roller causes a gradually increasing degree of impact of the roller on the connector tube, wherein the increased impact of the roller on the connector tube is configured to reduce a fluid flow rate through the connector tube.

11. The roller clamp control mechanism assembly according to claim 8, characterized in that: It also includes a spring pin that attaches the roller clamp to the control unit.

12. The roller clamp control mechanism assembly according to claim 1, characterized in that: The roller clamp control mechanism comprises: two rotary bearings, each of which is fixed in a corresponding bearing arm, said bearing arm pivoting about a fixed axis of said bearing arm; and a bearing clearance path for sliding movement of the rotary bearing, wherein the bearing clearance path allows the bearing arms of each swivel bearing to rotate inwardly without rotating outwardly, and The roller clamp assembly is capable of sliding on the roller and adjusting the position of the roller.

13. The roller clamp control mechanism assembly according to claim 12, characterized in that: Sliding of the roller in the direction of the smaller spacing between the guide wall and the roller causes a gradually increasing degree of impact of the roller on the connector tube, wherein the increased impact of the roller on the connector tube is configured to reduce a fluid flow rate through the connector tube.

14. The roller clamp control mechanism assembly according to claim 12, characterized in that: The manner in which the rollers of the roller clamp assembly are connected is independent of the initial position of the rollers.

15. The roller clamp control mechanism assembly according to claim 12, characterized in that: It also includes a bearing arm return spring configured to bias the bearing arm to return to an upright position.

16. A gravity infusion device, characterized in that: It includes: Piercing needle; Droplet chamber; Connector tube; Accessories; as well as A roller clamp assembly, the roller clamp assembly comprising: A housing configured to receive a portion of a connector tube of an infusion device, the housing comprising: two opposing side walls spaced apart from one another, each side wall having opposing guide grooves longitudinally positioned in an inner surface; a guide wall disposed between the side walls, the guide wall converging along its length toward the location of the guide groove; a roller having two axial protrusions slidably disposed in the guide grooves, the roller being configured to move along the longitudinal axis of the housing as the protrusions slide in the guide grooves, wherein the spacing between the guide wall and the roller decreases over the length of the guide wall; and A roller clamp control mechanism is adapted to the roller clamp to control the position of the roller clamp.

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